The 1970 4-4-2 equipped with the W-30 455 was an epic muscle car but it could've been even better with the 32-Valve W-43 455 ...

Estimates from the U.S. Department of Energy say they can improve fuel economy by about 7.5 percent. (Many manufacturers offering cylinder deactivation systems claim up to 20 percent efficiency ...

This is easier to do with the heads off and using a simple plate over the top of the cylinder for a piston stop ... use one of those on-head cantilever valve spring removal tools to push down ...